Shared Flashcard Set

Details

Intermolecular Forces
Forces, liquids and solids
27
Chemistry
12th Grade
03/06/2008

Additional Chemistry Flashcards

 


 

Cards

Term
phase
Definition

A homogeneous part of the system in contact with other parts of the system but seperated from them by a well defined boundary.

Ex: A glass with both water and ice

(solid and liquid phase)

Term
Intermolecular Forces
Definition
The attractive forces between the molecules
Term
Intramolecular forces
Definition
Holds atom together in a molecule
Term
Dipole-Dipole Forces
Definition
Attractive Forces between polar molecules
Term
Ion-Dipole Forces
Definition
Attractive Forces between an ion and a polar molecule
Term
Dispersion Forces
Definition
Attractive forces that arise as a result of temporary dipoles induced in atoms or molecules
Term
Polarizability
Definition

The ease with which the electron distribution in the atom or molecule can be distorted

 

Increases with greater # of electrons and more diffuse in the electron cloud

 

Term
Hydrogen Bond
Definition
A special dipole-dipole interaction between the hydrogen atom in a polar N-H, O-H, or F-H bond and an electronegative O, N, or F atom
Term
Surface tension
Definition
The amount of energy required to stretch or increase the surface of a liquid by a unit area
Term
Cohesion
Definition
Intermolecular attraction between like molecules
Term
Adhesion
Definition
Attraction between unlike molecules
Term
Viscosity
Definition
The measure of a fluid's resistance to flow
Term
Crystalline Solid
Definition

Possesses rigid and long-range order

 

Occupy specific (predictable) positions

Term
Amorphous Solids
Definition
do not possess a well-defined arrangement or a long-range molecular order
Term
unit cell
Definition
Basic, repeating stuctural unit of a crystalline solid
Term
Three types of Cubic Cells
Definition

Simple Cubic

Body-Centered Cubic

Face-Centered Cubic

Term
Glass
Definition
An optically transparent fusion product of inorganic materials that has cooled to a rigid state without crystallizing
Term
Equilibrium Vapor Pressure
Definition
The vapor pressure measured when a dynamic equilibrium exists between condensation and evaporation
Term
Molar Heat of Vaporization
Definition
The energy required to vaporize 1 mole of a liquid at its boiling point
Term
boiling point
Definition
The temperature at which the (equilibrium) vapor pressure of a liquid is equal to the external pressure
Term
Normal boiling point
Definition
The temperature at which a liquid boils when the external pressure is 1 atmosphere (atm)
Term
Critical Temperature
Definition
The temperature above which the gas cannot be made to liquefy, no matter how great the applied pressure
Term
Critical Pressure
Definition
The minimum pressure that must be applied to bring about liquefaction at a critical temperature
Term
Melting Point or Freezing Point of a Liquid
Definition
The temperature at which the solid and the liquid phaes coexist in equilibrium
Term
Molar Heat of Fusion
Definition
The energy required to melt 1 mole of a solid substance at its freezing point
Term
Molar Heat of Sublimation
Definition
The energy required to sublime 1 mole of a solid
Term
phase diagram
Definition
summarizes the conditions at which a substance exists as a solid, liquid or gas
Supporting users have an ad free experience!